CN107052522A - Arc static circuit and its method of work for AC-DC argon arc welding machine - Google Patents
Arc static circuit and its method of work for AC-DC argon arc welding machine Download PDFInfo
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- CN107052522A CN107052522A CN201710116617.3A CN201710116617A CN107052522A CN 107052522 A CN107052522 A CN 107052522A CN 201710116617 A CN201710116617 A CN 201710116617A CN 107052522 A CN107052522 A CN 107052522A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
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Abstract
The invention discloses a kind of arc static circuit and its method of work for AC-DC argon arc welding machine, the circuit is including first resistor etc., the pin of main transformer the 3rd is connected with the first electric capacity, the pin of main transformer the 5th is connected with the 4th electric capacity, the pin of main transformer the 6th is connected with the 6th electric capacity, the pin of main transformer the 4th, 7th pin is all grounded, first resistor successively with the first electric capacity, second electric capacity, 3rd resistor is connected, first diode and the second Diode series, 3rd diode and the 4th Diode series, first resistor and the first diodes in parallel, first diode and the 3rd diodes in parallel, 3rd diode is in parallel with second resistance, second resistance is connected with the 3rd electric capacity, 4th diode and the 4th resistor coupled in parallel, 4th resistance is connected with the 4th electric capacity, inductance and the 5th Diode series etc..Arc stability when ac argon arc weld welding is greatly improved in the present invention, circuit cost performance is high, is not likely to produce current interruption problem, circuit is simple and reliable.
Description
Technical field
It is more particularly to a kind of for AC-DC argon arc welding machine the present invention relates to a kind of arc static circuit and its method of work
Arc static circuit and its method of work.
Background technology
Because inversion type AC/DC argon arc welding machine communication function welds aluminium and aluminium alloy, appearance of weld is good, welding point power
Function admirable is learned, the favor of user is increasingly obtained.But, in order to prevent the straight-through damage of secondary inverting switching tube, output is rectified
There is dead band in negative conversion, this causes the easy current interruption of positive and negative switching instant, and this significantly impacts welding effect.Currently for the current interruption
The circuit stability of problem is poor, and circuit is more complicated, and device cost is high.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of arc static circuit and its work for AC-DC argon arc welding machine
Make method, arc stability when ac argon arc weld welding is greatly improved in it, circuit cost performance is high, is not likely to produce current interruption problem, electricity
Road is simple and reliable.
The present invention is to solve above-mentioned technical problem by following technical proposals：It is a kind of for AC-DC argon arc welding machine
Arc static circuit, it includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th electricity
Resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance,
15 resistance, the 16th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity,
Seven electric capacity, the 8th electric capacity, the 9th electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the five or two pole
Pipe, the 6th diode, the 7th diode, the 8th diode, the 9th diode first switch pipe, second switch pipe, the 3rd switch
Pipe, the 4th switching tube, the 5th triode, inductance, piezo-resistance, the first optocoupler, the second optocoupler, main transformer, pulse signal, it is main
The pin of transformer the 3rd is connected with the first electric capacity, and the pin of main transformer the 5th is connected with the 4th electric capacity, the pin of main transformer the 6th
Connected with the 6th electric capacity, the pin of main transformer the 4th, the 7th pin are all grounded, first resistor successively with the first electric capacity, second electricity
Hold, 3rd resistor is connected, the first diode and the second Diode series, the 3rd diode and the 4th Diode series, the first electricity
Resistance and the first diodes in parallel, the first diode and the 3rd diodes in parallel, the 3rd diode are in parallel with second resistance, the second electricity
Resistance is connected with the 3rd electric capacity, and the 4th diode and the 4th resistor coupled in parallel, the 4th resistance are connected with the 4th electric capacity, inductance and the five or two
Pole pipe is connected, and first switch pipe emitter stage is connected with second switch pipe collector, second switch pipe emitter stage, the 4th switching tube collection
Electrode all with the 8th resistant series, the 4th switching tube emitter stage connects with the 7th electric capacity, the 6th electric capacity and the 8th Diode series,
6th electric capacity, the 8th diode are all connected with the 7th diode, and the 8th diode is in parallel with the 7th electric capacity, the 7th electric capacity and the tenth
Two resistor coupled in parallel, the 4th switching tube base stage is connected with the tenth resistance, the second optocoupler emitter stage successively, the 11st resistance and the 12nd
Resistant series, the 11st resistance and the 9th diodes in parallel, the 9th diode are in parallel with the 8th electric capacity, the 6th diode successively with
9th resistance, the series connection of the second optocoupler colelctor electrode, the second optocoupler are connected with the 13rd resistance, the 5th three-level pipe collector successively, the
Five triode base stages and the 14th resistant series, the 14th resistance and the 15th resistant series, pulse signal are electric with the 9th successively
Hold, the 15th resistant series, the electric capacity of first switch Guan Yu five is in parallel, and the 5th electric capacity is in parallel with piezo-resistance, piezo-resistance according to
It is secondary to be connected with the 16th resistance, the first optocoupler, the first optocoupler emitter stage successively with the 5th resistance, the 3rd switching tube base series,
3rd switch pipe collector and the 7th resistant series, the 6th resistance and the 5th resistant series, piezo-resistance and the 7th resistor coupled in parallel.
The present invention also provides a kind of method of work of the arc static circuit for AC-DC argon arc welding machine, and it includes following step
Suddenly：
Step one, in the secondary full-wave rectification output plus terminal series inductance of main transformer, acted on using inductive energy storage, work as exchange
Output first switch pipe by turn off go to open when, improve DC+ (DC+ refers to positive electricity potential difference of the node of this in circuit to OUT-) positive
Voltage, electric arc stabilising arc ability when enhancing first switch pipe is opened；DC+ peak values are limited by the 3rd switching tube simultaneously, first is prevented
Switching tube over-voltage breakdown；
Step 2, when first switch pipe switchs to shut-off by opening, inductance produces very big inverse electromotive force DC+, by the
Five diodes and absorbing circuit clamp are in the threshold voltage of piezo-resistance, and the voltage is far above the first diode negative terminal voltage；When
First switch pipe is opened moment again, and OUT+ (OUT+ refers to welding machine output cathode) has very high output forward voltage relatively, solves
Current interruption problem when first switch pipe is opened, improves stabilising arc ability；
Step 3, when DC+ exceedes piezo-resistance threshold voltage, the conducting of the first optocoupler drives the 3rd switching tube to lead by 18V
It is logical, it is piezo-resistance threshold voltage by absorbing the 7th resistance to clamp DC+ peak values；DC+ voltage peaks can not be excessive, in order to avoid first
Switching tube over-voltage breakdown, it is impossible to too small, otherwise can not play stabilising arc effect；
Step 4, energy is provided by main transformer assists winding, when exchange output second switch pipe is gone to out by turning off
When logical, the conducting of the 4th switching tube improves DC- negative voltages, electric arc stabilising arc ability when enhancing second switch pipe is opened；
Step 5, second switch pipe conducting moment, pwm signal is synchronous pulse from low to high, and the 5th triode of driving is led
Logical, then the second optocoupler is turned on, and the 4th switching tube is turned on by driving, and main transformer assists winding is through the 6th electric capacity, the 7th diode
After rectification, the 7th diode anode negative voltage is unable to over-voltage breakdown second switch pipe, but is born much larger than the DC- after common rectification
To voltage, the 7th diode anode negative voltage is superimposed to after DC- by the 4th switching tube and the 8th resistance, and OUT+ has relative
Very height output negative voltage, solves the problems, such as current interruption when second switch pipe is opened, and improves stabilising arc ability.The positive progressive effect of the present invention
Fruit is：Arc stability when ac argon arc weld welding is greatly improved in the present invention, circuit cost performance is high, is not likely to produce current interruption and asks
Topic, circuit is simple and reliable.
Brief description of the drawings
Circuit diagrams of the Fig. 1 for the present invention for the arc static circuit of AC-DC argon arc welding machine.
Embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, to describe technical scheme in detail.
As shown in figure 1, the present invention includes first resistor R1, second resistance for the arc static circuit of AC-DC argon arc welding machine
R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance
R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th
Resistance R15, the 16th resistance R16, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5,
6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the first diode D1, the second diode D2, the three or two
Pole pipe D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th
Diode D9 first switch pipes Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th triode Q5, inductance
L1, piezo-resistance RY1, the first optocoupler U1, the second optocoupler U2, main transformer T1, pulse signal PWM, main transformer T1 the 3rd draw
Pin is connected with the first electric capacity C1, and the pins of main transformer T1 the 5th are connected with the 4th electric capacity C4, the pins of main transformer T1 the 6th and
Six electric capacity C6 connect, and the pins of main transformer T1 the 4th, the 7th pin be all grounded, first resistor R1 successively with the first electric capacity C1, the
Two electric capacity C2,3rd resistor R3 connect, and the first diode D1 connects with the second diode D2, the 3rd diode D3 and the four or two pole
Pipe D4 connects, and first resistor R1 is in parallel with the first diode D1, and the first diode D1 is in parallel with the 3rd diode D3, the three or two pole
Pipe D3 is in parallel with second resistance R2, and second resistance R2 connects with the 3rd electric capacity C3, and the 4th diode D4 is in parallel with the 4th resistance R4,
4th resistance R4 connects with the 4th electric capacity C4, and inductance L1 connects with the 5th diode D5, first switch pipe Q1 emitter stages and second
Switching tube Q2 colelctor electrodes are connected, and second switch pipe Q2 emitter stages, the 4th switching tube Q4 colelctor electrodes are all connected with the 8th resistance R8, the
Four switching tube Q4 emitter stages are connected with the 7th electric capacity C7, and the 6th electric capacity C6 connects with the 8th diode D8, the 6th electric capacity C6, the 8th
Diode D8 is connected with the 7th diode D7, and the 8th diode D8 is in parallel with the 7th electric capacity C7, the 7th electric capacity C7 and the 12nd
Resistance R12 is in parallel, and the 4th switching tube Q4 base stages are connected with the tenth resistance R10, the second optocoupler U2 emitter stages successively, the 11st resistance
R11 connects with the 12nd resistance R12, and the 11st resistance R11 is in parallel with the 9th diode D9, the 9th diode D9 and the 8th electric capacity
C8 is in parallel, and the 6th diode D6 connects with the 9th resistance R9, the second optocoupler U2 colelctor electrodes successively, and the second optocoupler U2 is successively with the tenth
Three resistance R13, the series connection of the 5th triode Q5 colelctor electrodes, the 5th triode Q5 base stages are connected with the 14th resistance R14, the 14th electricity
Resistance R14 connects with the 15th resistance R15, and pulse signal PWM connects with the 9th electric capacity C9, the 15th resistance R15 successively, and first opens
Pass pipe Q1 is in parallel with the 5th electric capacity C5, and the 5th electric capacity C5 is in parallel with piezo-resistance RY1, and piezo-resistance RY1 is electric with the 16th successively
Hinder R16, the first optocoupler U1 series connection, the first optocoupler U1 emitter stages successively with the 5th resistance R5, the 3rd switching tube Q3 base series, the
Three switching tube Q3 colelctor electrodes are connected with the 7th resistance R7, and the 6th resistance R6 connects with the 5th resistance R5, piezo-resistance RY1 and the 7th
Resistance R7 is in parallel.
Method of work of the present invention for the arc static circuit of AC-DC argon arc welding machine, it comprises the following steps：
Step one, in the secondary full-wave rectification output plus terminal series inductance of main transformer, acted on using inductive energy storage, work as exchange
Output first switch pipe by turn off go to open when, improve DC+ (DC+ refers to positive electricity potential difference of the node of this in circuit to OUT-) positive
Voltage, electric arc stabilising arc ability when enhancing first switch pipe is opened；DC+ peak values are limited by the 3rd switching tube simultaneously, first is prevented
Switching tube over-voltage breakdown；
Step 2, when first switch pipe switchs to shut-off by opening, inductance produces very big inverse electromotive force DC+, by the
Five diodes and absorbing circuit clamp are in the threshold voltage of piezo-resistance, and the voltage is far above the first diode negative terminal voltage；When
First switch pipe is opened moment again, and OUT+ (OUT+ refers to welding machine output cathode) has very high output forward voltage relatively, solves
Current interruption problem when first switch pipe is opened, improves stabilising arc ability；
Step 3, when DC+ exceedes piezo-resistance threshold voltage, the conducting of the first optocoupler drives the 3rd switching tube to lead by 18V
It is logical, it is piezo-resistance threshold voltage by absorbing the 7th resistance to clamp DC+ peak values；DC+ voltage peaks can not be excessive, in order to avoid first
Switching tube over-voltage breakdown, it is impossible to too small, otherwise can not play stabilising arc effect；
Step 4, energy is provided by main transformer assists winding, when exchange output second switch pipe is gone to out by turning off
When logical, the conducting of the 4th switching tube improves DC- (DC- refers to negative electricity potential difference of the node of this in circuit to OUT-) negative voltage, enhancing the
Electric arc stabilising arc ability when two switching tubes are opened；
Step 5, second switch pipe conducting moment, PWM (Pulse Width Modulation, pulse width modulation) letters
Number for synchronous pulse from low to high, driving the 5th triode conducting, then the second optocoupler turn on, the 4th switching tube is turned on by driving,
Main transformer assists winding after the 6th electric capacity, the 7th diode rectification, the 7th diode anode negative voltage can not overvoltage hit
Second switch pipe is worn, but much larger than the DC- negative voltages after common rectification, the 7th diode anode negative voltage is opened by the 4th
Close pipe and the 8th resistance is superimposed to after DC-, OUT+ has very height output negative voltage relatively, solve disconnected when second switch pipe is opened
Arch problem, improves stabilising arc ability.
Operation principle of the present invention：AC (high-frequency signal) is main inverter output signal of transformer primary side, and the signal is
After the filtering of power network 50HZ ac voltage rectifiers, an inversion full-bridge topology is transformed into high frequency (50KHZ) approximate square waves alternating voltage；
High-frequency ac voltage is isolated through main transformer, power transmission, fast to recover the first diode, the second diode, the 3rd diode, the
After four diode full-wave rectifications, being transformed to DC+ and OUT-, (OUT- is that main transformer secondary tap refers to zero potential, passes through one
Striking inductance is connected with welding machine output negative pole) between voltage be forward dc electricity, between DC- and OUT- voltage be negative sense direct current
Electricity；First resistor, second resistance, 3rd resistor, the 4th resistance and the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity point
Wei not the diode of fast recovery diode first, the second diode, the 3rd diode, the absorbing circuit of the 4th diode；Setting weldering
Machine ac output frequency is 100HZ, and a cycle is 10ms, and voltage 4.8ms is just, first switch pipe leads between OUT+ and OUT-
It is logical, the cut-off of second switch pipe；0.2ms dead bands, first switch pipe and second switch pipe all end；Voltage between OUT+ and OUT-
4.8ms be it is negative, second switch pipe conducting, first switch pipe by；0.2ms dead bands, first switch pipe and second switch pipe are all cut
Only；A cycle terminates；When first switch pipe and second switch pipe all end, due to the output of no energy, first switch pipe
Or second switch pipe opens moment, it is necessary to which the energy (voltage) higher than normal weld removes the electric arc that ignites, pilot arc is stable,
So moment is opened in first switch pipe and second switch pipe, in OUT+ endlap high voltages；Inductance, first switch pipe, the 5th
Arc static circuit when diode and absorbing circuit composition first switch pipe are opened, first switch pipe shutdown moment, due to current break,
The backward voltage that inductance is produced greatly improves DC+ voltages, and the voltage is clamped in certain value by the 5th diode and absorbing circuit, with
Exempt from first switch pipe excessive pressure damages, first switch pipe is opened moment, the DC+ forward voltages of raising are used as OUT+ output pilot arcs
It is stable；5th electric capacity, the 5th resistance, the 6th resistance, the 7th resistance, the 16th resistance, piezo-resistance, the 3rd switching tube and first
Optocoupler constitutes absorbing circuit, and the 5th electric capacity is filter capacitor, when voltage exceedes piezo-resistance threshold values between DC+ and DC-, and first
Diode current flow between 1 pin and 2 pin of optocoupler, causes 4 pin and 3 pin of the first optocoupler to turn on, then 18V is driven by the 5th resistance
3rd switching tube is turned on, and DC+ is pulled to piezo-resistance threshold values by absorbing the 7th resistance；Once DC+ voltages are less than piezo-resistance
Threshold values, the cut-off of the 5th diode, therefore DC+ is limited in piezo-resistance threshold voltage, realize reliably steady when first switch pipe is opened
Arc, and it is unlikely to over-voltage breakdown first switch pipe；Realize and larger negative voltage is superimposed when second switch pipe is opened, second switch pipe
Open moment, pulse signal provides a pulse from low to high, change pulse by the 9th electric capacity, driven by the 14th resistance
5th triode is turned on, the diode current flow between 1 pin and 2 pin of the second optocoupler, and 4 pin of the second optocoupler and 3 pin are turned on；Main transformer
The pin of depressor assists winding 6 and 7 pin output voltages are high-frequency ac, are relative by the 7th diode rectification after the 6th electric capacity
Very high negative pressure；6th electric capacity is increase impedance loop metering function, and the 8th diode provides loop for forward voltage；Open when the 4th
When closing pipe shut-off, voltage between DC- and the 7th diode anode is larger forward voltage, then DC- passes through the 6th diode, the
Nine resistance, the second optocoupler and the tenth resistance drive the conducting of the 4th switching tube, then the relatively large negative sense electricity of the 7th diode anode
Pressure is by the 4th switching tube, and the 8th resistance is superimposed to DC-, when second switch pipe opens moment, there is very big negative voltage relatively
Output, reliable stabilising arc.
Particular embodiments described above, technical problem, technical scheme and beneficial effect to the solution of the present invention are carried out
It is further described, should be understood that the specific embodiment that the foregoing is only of the invention, be not limited to
The present invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. should be included in this
Within the protection domain of invention.
Claims (2)
1. a kind of arc static circuit for AC-DC argon arc welding machine, it is characterised in that it includes first resistor, second resistance,
Three resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st
Resistance, the 12nd resistance, the 13rd resistance, the 14th resistance, the 15th resistance, the 16th resistance, the first electric capacity, the second electricity
Appearance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the first diode,
Second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode,
9th diode first switch pipe, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th triode, inductance, pressure-sensitive electricity
Resistance, the first optocoupler, the second optocoupler, main transformer, pulse signal, the pin of main transformer the 3rd are connected with the first electric capacity, main transformer pressure
The pin of device the 5th is connected with the 4th electric capacity, and the pin of main transformer the 6th is connected with the 6th electric capacity, the pin of main transformer the 4th, the 7th
Pin is all grounded, and first resistor is connected with the first electric capacity, the second electric capacity, 3rd resistor successively, the first diode and the two or two pole
Pipe is connected, the 3rd diode and the 4th Diode series, first resistor and the first diodes in parallel, the first diode and the three or two
Pole pipe is in parallel, and the 3rd diode is in parallel with second resistance, and second resistance is connected with the 3rd electric capacity, the 4th diode and the 4th resistance
Parallel connection, the 4th resistance is connected with the 4th electric capacity, inductance and the 5th Diode series, first switch pipe emitter stage and second switch pipe
Colelctor electrode connect, second switch pipe emitter stage, the 4th switch pipe collector all with the 8th resistant series, the 4th switching tube emitter stage
Connected with the 7th electric capacity, the 6th electric capacity and the 8th Diode series, the 6th electric capacity, the 8th diode all with the 7th diode phase
Even, the 8th diode is in parallel with the 7th electric capacity, the 7th electric capacity and the 12nd resistor coupled in parallel, and the 4th switching tube base stage is successively with the tenth
Resistance, the series connection of the second optocoupler emitter stage, the 11st resistance and the 12nd resistant series, the 11st resistance and the 9th diode are simultaneously
Connection, the 9th diode is in parallel with the 8th electric capacity, and the 6th diode is connected with the 9th resistance, the second optocoupler colelctor electrode successively, and second
Optocoupler is connected with the 13rd resistance, the 5th three-level pipe collector successively, the 5th triode base stage and the 14th resistant series, the tenth
Four resistance and the 15th resistant series, pulse signal successively with the 9th electric capacity, the 15th resistant series, first switch Guan Yu five
Electric capacity is in parallel, and the 5th electric capacity is in parallel with piezo-resistance, and piezo-resistance is connected with the 16th resistance, the first optocoupler successively, the first light
Coupling emitter stage switchs pipe collector and the 7th resistant series, the 6th with the 5th resistance, the 3rd switching tube base series, the 3rd successively
Resistance and the 5th resistant series, piezo-resistance and the 7th resistor coupled in parallel.
2. the method for work of a kind of arc static circuit for AC-DC argon arc welding machine, it is characterised in that it comprises the following steps：
Step one, in the secondary full-wave rectification output plus terminal series inductance of main transformer, acted on using inductive energy storage, when exchange output
First switch pipe by turn off go to open when, improve DC+ forward voltages, enhancing first switch pipe electric arc stabilising arc ability when opening；
DC+ peak values are limited by the 3rd switching tube simultaneously, first switch pipe over-voltage breakdown is prevented；
Step 2, when first switch pipe switchs to shut-off by opening, inductance produces very big inverse electromotive force DC+, by the five or two
Pole pipe and absorbing circuit clamp are in the threshold voltage of piezo-resistance, and the voltage is far above the first diode negative terminal voltage；When first
Switching tube is opened moment again, and OUT+ has very high output forward voltage relatively, solves the problems, such as current interruption when first switch pipe is opened,
Improve stabilising arc ability；
Step 3, when DC+ exceedes piezo-resistance threshold voltage, the conducting of the first optocoupler drives the 3rd switching tube to turn on by 18V,
It is piezo-resistance threshold voltage by absorbing the 7th resistance to clamp DC+ peak values；DC+ voltage peaks can not be excessive, in case first opens
Close pipe over-voltage breakdown, it is impossible to too small, otherwise can not play stabilising arc effect；
Step 4, by main transformer assists winding provide energy, when exchange output second switch pipe by turn off go to open when,
The conducting of 4th switching tube improves DC- negative voltages, electric arc stabilising arc ability when enhancing second switch pipe is opened；
Step 5, second switch pipe conducting moment, pwm signal is synchronous pulse from low to high, and the 5th triode of driving is turned on, then
Second optocoupler is turned on, and the 4th switching tube is turned on by driving, and main transformer assists winding is through the 6th electric capacity, the 7th diode rectification
Afterwards, the 7th diode anode negative voltage is unable to over-voltage breakdown second switch pipe, but much larger than the DC- negative senses electricity after common rectification
Pressure, the 7th diode anode negative voltage is superimposed to after DC- by the 4th switching tube and the 8th resistance, and OUT+ has relatively very high
Negative voltage is exported, current interruption when second switch pipe is opened is solved the problems, such as, stabilising arc ability is improved.
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| CN201710116617.3A CN107052522B (en) | 2017-02-28 | 2017-02-28 | Arc static circuit and its working method for AC-DC argon arc welding machine |
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| CN201710116617.3A CN107052522B (en) | 2017-02-28 | 2017-02-28 | Arc static circuit and its working method for AC-DC argon arc welding machine |
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| CN107052522B CN107052522B (en) | 2019-10-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107627009A (en) * | 2016-07-18 | 2018-01-26 | 上海沪工焊接集团股份有限公司 | Welding machine arc stabilizer |
| CN108127221A (en) * | 2017-12-29 | 2018-06-08 | 上海广为焊接设备有限公司 | Ac square wave welding machine active clamp device |
| CN110768565A (en) * | 2019-11-28 | 2020-02-07 | 唐山松下产业机器有限公司 | Power supply method and device, power supply and electronic equipment |
| WO2023087743A1 (en) * | 2021-11-19 | 2023-05-25 | 杭州凯尔达电焊机有限公司 | Alternating current commutation pilot arc circuit, and alternating current welding power supply |
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| CN2223165Y (en) * | 1995-06-14 | 1996-03-27 | 广州有色金属研究院 | Alternating-current and direct-current argon arc welding controlling machine |
| CN103856092A (en) * | 2014-02-21 | 2014-06-11 | 清华大学 | Secondary inversion recrudescence arc voltage generating circuit of polarity-changing welding power supply and application of secondary inversion recrudescence arc voltage generating circuit |
| CN105880798A (en) * | 2014-12-03 | 2016-08-24 | 盐城鼎力达焊接科技有限公司 | Pilot arc circuit of inverter alternating current-direct current square wave argon arc welding machine |
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| CN107627009A (en) * | 2016-07-18 | 2018-01-26 | 上海沪工焊接集团股份有限公司 | Welding machine arc stabilizer |
| CN107627009B (en) * | 2016-07-18 | 2020-06-30 | 上海沪工焊接集团股份有限公司 | Arc stabilizer of welder |
| CN108127221A (en) * | 2017-12-29 | 2018-06-08 | 上海广为焊接设备有限公司 | Ac square wave welding machine active clamp device |
| CN108127221B (en) * | 2017-12-29 | 2020-03-20 | 上海广为焊接设备有限公司 | Active clamping device of alternating-current square wave welding machine |
| CN110768565A (en) * | 2019-11-28 | 2020-02-07 | 唐山松下产业机器有限公司 | Power supply method and device, power supply and electronic equipment |
| WO2023087743A1 (en) * | 2021-11-19 | 2023-05-25 | 杭州凯尔达电焊机有限公司 | Alternating current commutation pilot arc circuit, and alternating current welding power supply |
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